Definition of standard-bearer in English:

noun

Caesar records the standard-bearer of X Legion in the Roman invasion of Britain who, seeing his comrades reluctant to disembark, jumped into the surf and obliged them to follow him or lose their standard.

The standard-bearer and the battalion commander are a scant ten up from me, leading the march.

As a Volunteer he was his Unit's standard-bearer and fought in the 1916 Rising.